煤矿通风机控制系统改造与设计1

成都理工大学硕士学位论文煤矿通风机控制系统改造与设计姓名：聂丹凤申请学位级别：硕士专业：测试计量技术及仪器指导教师：康东20090501I1983420096365PLCPLCPLCPLCGX8.26PLCCC-LinkFX2NPLCFR-E500IIFX2NPLCQPLCCC-LinkQPLCCC-LinkFX2NPLCPLCAbstractIIIReformandDesignofControlSystemforLocalVentilatorIntroductionoftheauthor:NieDanfeng,female,wasborninApril,1983whosetutorwasProfessorKangDong.ShegraduatedfromChengduUniversityofTechnologyinMeasuringandTestingTechnologiesandInstrumentsmajorandwasgrantedtheMasterDegreeinJune,2009.AbstractCoalresourceprovidespowerfulenergysupporttoeconomicconstructioninourcountry.Becausetheprocessingtechniqueofcoalindustryisbackward,itishighlyenergy-consuming,evenenergy-wasting.Forexample,ventilatorcontrolsystemwastesalotofelectricalenergy.Asthekeycomponentofmineventilationsystem,theventilatorisbigpowerandworksallovertheyear.Thewindspeedandrateunderminearestricklyregulatedacoordingtothesafetyregulationincoalmine.Whenthecoalmineisdesigned,theventilatorcapacityisdecidedbasedonthewindrateneededinactual.Tomeetthewindrateoftherequirementsinthesafetyregulationundercoalmine,theventilatorisworkinginfullpowermostoftime.Thetraditionalsystemofventilatorcontrolsthewindrateandpressurebyusingpaddle,whichcausesalotofwasteofelectricalpower.Thecontrolofventilatorcouldcausesomepollutionbesidesthewasteofpowerwhenitisworking.Theventilatorofmostminecoalistakingouttheairunderthemine.Theventilatorpumpstheairthatisintheminetunnelouttotheatmosphere,includingmanydustandsomecombustiblegassuchasmethaneandcarbonmonoxidewhichhasbeenincriminatedinairpollution.Inviewoftheaboveproblems,itisnecessarytoreconstructthemineventilationsystem.Asthekeycomponentofmineventilationsystem,mineventilatorplaysanimportantroleincoalminesafety.Itisoneofthemainequipmentsinthesystem.SoresearchanddesignofitsvariablefrequencyspeedregulationsystemwithPLCcontrolhavegoodeconomicbenefits.Itnotonlyimprovesthemechanicalandautomaticlevelofcoalproduction,butalsosaveslargeelectricalenergy.Takingalaboratorycounter-rotatingaxialfanascontrolmember,thispaperIVresearchedanddesigneditsfrequencycontrolsystemcombiningPLCcontroltechnology,frequencycontroltechnologyandconfigurationmonitoringtechnology.Firstly,thepaperchoserationalsystemcontrolschemebasedonexperimentalperformancecurvesandcontrolrequirementsofmineventilator.Thencontrolcircuitwasdesignedonthescheme.Atthesametime,hardwaresuchasPLC,Frequencyconverter,Touchscreenwasdistributed.Basedontheresearchofairandmethanecontrolalgorithm,thePLCcontrolprogramofsystemwasdesignedwithGX8.26.Afterthat,accordingtofunctionalrequirementsofsystem,themonitoringsystemofmineventilatorwasdesignedwithForceControlConfigurationsoftwareandTouchscreentechnologyandPLCofMitsubishi.ThecontrolsystemofventilatorcouldbeoperatedbyCC-Linkbydistance(FX2NPLCwithtouchscreenprovidesinformationforman-machinecommunication).ThentheparametersofFR-E500converterweresetup.Atlast,simulationdebuggingexperimentsofrunningsystemwerefinished.Itcontainedair-controlsimulationdebuggingexperiment,methane-controlsimulationdebuggingexperiment,dust-removalsystemsimulationdebuggingexperimentandsimulationdebuggingexperimentofmonitoringsystem.Theventilationsystemisdesignedassubordinativeconstructionwhichiskeypartofthispaper.Theconverter,thesystemofshuntpipeanddust-removalsystemassecondarystationareundercontrolofFX2NPLC.Theconvertergetsventilatorworked.QPLCasprimarystationofthesystemcontrolsallthesecondarystationsthroughCC-Link.TomakesurethattheventilationsystemcouldworkwhenthereissomethingwrongwithsecondarystationFX2NPLC,theprimarystationmasterstheredundancyofconverter,systemofshuntpipeanddust-removalsystembyCC-Linkbesidescontrollingitself.Theoperationofentiresystemisvisual.Themonitoringcentercouldcontrolthewholesysteminremotedistance.Itwasprovedthatthecontrolsystemcanadjustfanspeedtomeetwindpressureandrateinheadinglanewaythroughsimulationdebuggingexperimentsinlaboratoryaccordingtoactualwindrateinminelaneway.Besides,thedesignedsystemcanbemasteredbyon-sitecontrolorremotecontrol.Itcanalsomonitorthewindpressure,methanedensity,fanspeedandsoon.Meanwhile,thecontrolsystemhadgoodfunctionoffaultwarningandtreating.Keywords:MineventilatorFrequencyconverterPLCTouchscreenConfigurationI1983420096365PLCPLCPLCPLCGX8.26PLCCC-LinkFX2NPLCFR-E5001111.119951.6kW3200kWh1/241%-50%[1][13]365[2]1.2PLCPLCPLC,,2—,[4]1.320602080%20%[5],,,,,5000kW,1.41.4.1Pn131/21/8F1.4.21.5PLCPLCGX8.26PLCCC-LinkFR-E500FX2NPLCQPLCCC-LinkQPLCCC-LinkFX2NPLC422.12.1.1:116060(1)(1)2fwnssppπ=−=−(2-1):1f—;1w—;p—;s—11()/()/sssnnn=−=−(2-2):sn—;w—1160/60/2snfpwpπ==(2-3)((2-1),(2-2)(2-3)1fsnnsn251fsnn1fsnn2.1.21f1f1f[6][7]111114.44WEfWR=Φ(2-4)W—1WR—1Φ—1U1E1111UEIZ=+(2-5)1Z—1I—11IZ111114.44WUEfWR≈=Φ111EKf=Φ(2-6)614.44WKWR=(2-7)111/UKfΦ=(2-8)eT1Φ12cosemTCIϕ=Φ(2-9)mC—2I—cosϕ—(2-8)(2-9)eT1Φ1f1U11/Uf1ΦeT21U1f11/Uf1U(2-9)1ΦeTnePTw=2wnπ=1feTP3s1ΦeT1w1weT2.1.327PNηQ—(PQ−)—(SPQ−)—(NQ−)—(Qη−)—(SQη−)—(SPQ−)2-12-22-12-2[8]1()238PQNη2PAQBQC=++(2-10)P—PaQ—3/msABC—ABCOrigin7.5A,B,C2.1.42PRQ∆=(2-11)P∆—PaR—RQ—3/ms2-3—(HQ−)a,b(aRbR)1,21n2n—1n2n)A,B,C292-3HQ−2-31—(HQ−)aA1Q1001N1Q11AHOQ1Q2QbAB22BHOQ—2